Unity Pro vs Unity Free License Restriction Question

Section C under the Heading 2: Unity Pro."

"A company, incorporated entity, or individual may not use both Unity and Unity Pro."

Basically does this mean that after I buy the Pro license and I want to use Unity at all, I have to be using only the single computer I installed Unity Pro on? (Unless I 'migrate' the license to a different machine?) That restriction would be a severe disadvantage to an independent developer like me if that's what it means.

You can actually install Unity on two machines, so that should be fine for most cases. If you need more than 2 installations, you might consider voting for Licensing: License Management Portal (originally, this was called "More flexible license activation for Unity Editor" - not sure who changed that title).

See also this forum thread: More flexible license activation for Unity Editor